1280500

素因数分解:

$2^2\times 5^3\times {\mathrm{13}}^1\times {\mathrm{197}}^1$

素因数の和:229

約数の個数: 48

約数和(自身を含む): 3027024

約数和(自身を除く): 1746524

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 125, 130, 197, 250, 260, 325, 394, 500, 650, 788, 985, 1300, 1625, 1970, 2561, 3250, 3940, 4925, 5122, 6500, 9850, 10244, 12805, 19700, 24625, 25610, 49250, 51220, 64025, 98500, 128050, 256100, 320125, 640250, 1280500]

約数ペア:

[(1, 1280500), (2, 640250), (4, 320125), (5, 256100), (10, 128050), (13, 98500), (20, 64025), (25, 51220), (26, 49250), (50, 25610), (52, 24625), (65, 19700), (100, 12805), (125, 10244), (130, 9850), (197, 6500), (250, 5122), (260, 4925), (325, 3940), (394, 3250), (500, 2561), (650, 1970), (788, 1625), (985, 1300)]